Initial Situation
uandu GmbH, an innovative online retailer for lifestyle and everyday products, wanted to make their Halloween campaign more efficient.
The goal: generate more revenue per campaign – without driving up WhatsApp META costs unnecessarily.
Solution: Retargeting Within the 24h Conversation Window
With Chatarmin, uandu applied a clever WhatsApp hack:
- Second message to non-buyers: All contacts who did not convert after the first message received a follow-up just a few hours later.
- Cost savings: Since both messages were sent within the 24h window, META costs were only charged once.
- Klaviyo + Shopify integration: Enabled easy creation of a non-buyer segment and automated follow-up messages.
Results
This smart Halloween campaign delivered impressive results:
- €5,312.53 WhatsApp revenue 💰
- €974.39 WhatsApp costs
- 5.45X ROWAS 🚀
- €51.60 AOV 📦
Conclusion
This case study shows how WhatsApp retargeting within the 24h conversation window is a true performance booster.
By combining precise segmentation, smart cost optimization, and automated setup through Chatarmin, uandu significantly increased the efficiency of their WhatsApp campaign.
👉 Want to learn how your brand can leverage WhatsApp retargeting?
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